package main

import (
	"fmt"
)

func main() {
	// var age int

	// age = 18
	// var age = 18
	var age = 18

	fmt.Println(age)

	// var age = 20 变量不可重复定义

	fmt.Println(age)
	var a uint8 = 129

	fmt.Println(a)
}
